A high-power continuously variable power output device

Abstract

The application discloses a high-power stepless speed change power output device, which comprises a control system, a first driving mechanism, a second driving mechanism, a transmission mechanism, a split mechanism, a base, a support and a gear box, the control system is used for controlling the first driving mechanism, the second driving mechanism and the split mechanism to act, the left side of the base is provided with the gear box, the gear box is internally provided with the transmission mechanism, the right side of the base is provided with the support, the right side of the support is fixed with the first driving mechanism and the second driving mechanism, the support is internally provided with the split mechanism, and the split mechanism is used for switching the power output modes of the first driving mechanism and the second driving mechanism, the same output speed is changed by changing the motor displacement, the heat generation of a throttle valve in a throttling process is eliminated, and the energy utilization rate is improved, and the split mechanism is matched with the stepless speed change first driving mechanism and the stepless speed change second driving mechanism through clutching, so that the different torque and speed requirements of the power device under various complex working conditions can be met.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of agricultural machinery power device, in particular to a high-power stepless speed change power output device. BACKGROUND

[0002] Agriculture and construction industry is an indispensable part of everyone's life, and the demand for agricultural machinery and engineering machinery used is also very huge, and the demand for driving part as the common part of all machines is also very huge. The mainstream configuration currently used is a planetary reducer driven by a hydraulic motor to achieve mechanical walking. This mechanism still has certain defects in multi-stage speed change, so it is necessary to develop a high-power stepless speed change power output device. SUMMARY

[0003] In view of the shortcomings of the existing power output device, the purpose of the present application is to provide a high-power stepless speed change power output device, which has the advantages of self-adjusting speed change, without throttle valve, reducing heat generation, improving efficiency, etc.

[0004] To achieve the above purpose, one technical scheme adopted by the present application is: a high-power stepless speed change power output device, comprising a control system, a first driving mechanism, a second driving mechanism, a transmission mechanism, a split driving mechanism, a base, a support and a gear box, the control system is used to control the actions of the first driving mechanism, the second driving mechanism and the split driving mechanism, the left side of the base is provided with the gear box, the gear box is provided with the transmission mechanism, the right side of the base is provided with the support, the right side of the support is fixed with the first driving mechanism and the second driving mechanism, the support is provided with the split driving mechanism, and the split driving mechanism is used to switch the power output mode of the first driving mechanism and the second driving mechanism.

[0005] Preferably, the first driving mechanism and the second driving mechanism are the same in structure and each comprise a body, an output shaft, a driving piston, a connecting rod, a crank and an adjusting assembly, the body is fixedly connected to the right side of the support, a plurality of driving pistons are arranged at equal angles along the circumference inside the body, the plurality of driving pistons are slidably connected along the axis of the driving pistons and the body, a driving cavity is formed at one end of the driving piston and the body, the driving cavity is communicated with the output port of the external oil pump through an oil channel, the other end of the driving piston is rotatably connected to one end of the connecting rod, the other end of the connecting rod is rotatably connected to the crank, the crank is fixedly connected to the adjusting assembly, the other side of the adjusting assembly is provided with the output shaft, and the output shaft is rotatably connected to the body. The volume change in the plurality of driving cavities can be controlled through the output and release of the oil, so as to drive the reciprocating movement of the driving piston through the volume change, and the reciprocating movement of the driving piston drives the rotation of the output shaft through the connecting rod.

[0006] Further preferably, the adjusting assembly comprises a sleeve, an action piston, a support piston and a first elastic element, the sleeve is slidingly connected at one end of the output shaft, the sliding path of the sleeve is perpendicular to the axis of the output shaft, the action piston is slidingly connected at one end of the output shaft, the support piston is slidingly connected at one end of the output shaft, the action piston and the support piston are oppositely arranged along the axis of the output shaft, the inner lower end surface of the sleeve is connected with the support piston, the inner upper end surface of the sleeve is connected with the action piston, the sleeve and the eccentric of the crank are fixed, the first elastic element is arranged between the support piston and the output shaft, the first elastic element forces the support piston to move downward, the action piston and the output shaft form an adjusting cavity, the adjusting cavity is communicated with the output port of the external oil pump through an oil passage, by controlling the input and output of the oil pump, the pressure in the adjusting cavity can be controlled, when the pressure in the adjusting cavity is greater than the elastic force of the first elastic element, the action piston drives the sleeve to move upward, when the pressure in the adjusting cavity is less than the elastic force of the first elastic element, the support piston drives the sleeve to move downward, so that the sleeve can move along the path perpendicular to the axis of the output shaft; (as Figure 5 shown)

[0007] Preferably, the transmission mechanism comprises a first gear, a second gear, a third gear, a transmission shaft and a spline, the first gear is fixedly connected with the output shaft in the first driving mechanism, the second gear is fixedly connected with the output shaft in the second driving mechanism, one end of the transmission shaft is rotatably connected with the bracket through a bearing, the other end of the transmission shaft is rotatably connected with the gear box through a bearing, the spline is fixedly connected with the transmission shaft, the third gear is embedded with the spline, and the first gear is engaged with the third gear.

[0008] Preferably, the distribution mechanism comprises a distribution piston, a transmission gear and a second elastic element, the distribution piston is slidingly connected with the transmission shaft, a cavity is formed between the distribution piston and the bracket, the cavity is connected with the output port of the oil pump through an oil passage, the second elastic element is arranged between the third gear and the transmission gear, the third gear and the transmission gear can move axially along the spline, the left side of the third gear is in contact with the bearing, the second elastic element forces the transmission gear to move rightward, the right side of the transmission gear is in contact with the distribution piston, when the pressure in the cavity is greater than the force provided by the second elastic element, the distribution piston moves leftward under the driving of the pressure in the cavity, thereby driving the transmission gear and the second gear to engage, when the pressure in the cavity is less than the force provided by the second elastic element, the transmission gear moves rightward under the driving of the second elastic element, thereby driving the transmission gear and the second gear to disengage; (as Figure 3 shown)

[0009] Further preferably, the third gear and the transmission gear are provided with fixed grooves corresponding to the position of the second elastic element, and the fixed grooves are used for fixing the second elastic element.

[0010] Preferably, the control system comprises a displacement control sensor, a shuttle valve and a servo control, the displacement control sensor is used for controlling the servo control, the first driving mechanism and the second driving mechanism, the servo control is used for adjusting the shuttle valve to fill in or discharge oil through the oil path P, the shuttle valve leads to a control oil path P, the oil path P is used for connecting the adjusting cavity of the action piston, in the P oil path filling process, the action piston drives the shaft sleeve to move, thereby adjusting the moving distance of the shaft sleeve, in the design, the displacement, the eccentric distance and the extension length of the action piston are corresponded one by one, in the work, the displacement can be obtained according to the feedback signal given by the displacement control sensor, then the displacement is compared with the required displacement, whether to discharge or fill in is determined, after the signal reaches the servo control module, the servo control module controls the oil path P to fill in oil to the adjusting cavity of the action piston, or discharges oil through the oil path T, so that the effect of controlling the displacement is achieved.

[0011] The beneficial effects of the present application are: 1. The power device of the present application cancels the way of controlling flow through the throttle valve to obtain different output speeds, and changes to the way of changing the motor displacement, eliminates the heat of the throttle valve in the throttling process, improves the energy utilization rate, and reduces the demand of the device on the hydraulic system; 2. Through the cooperation of the first driving mechanism and the second driving mechanism with the clutch and the stepless speed change, the different torque and speed requirements of the power device under various complex working conditions can be met; 3. The gear set of the transmission mechanism also corresponds to different speed ratios, which can produce more output conditions. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 The transmission diagram of the present application;

[0013] Figure 2 The hydraulic principle diagram of the first driving mechanism and the second driving mechanism of the present application;

[0014] Figure 3 The cross-sectional view of the present application;

[0015] Figure 4 The appearance view of the present application Figure 3 The local enlarged view of the I area in the present application;

[0016] Figure 5 The cross-sectional view of the adjusting assembly in the first driving mechanism and the second driving mechanism of the present application;

[0017] Figure 6 The structure diagram of the first driving mechanism and the second driving mechanism of the present application;

[0018] Figure 7 The appearance view of the present application

[0019] Figure 8 The assembly view of the transmission mechanism of the present application. DETAILED DESCRIPTION

[0020] The advantages and features of the present application will become more apparent from the following detailed description of preferred embodiments, given by way of example only, with reference to the accompanying drawings, in which:

[0021] It should be noted that, in the description of the present application, the terms "upper", "lower", "left", "right", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is merely for the convenience of description, and does not indicate or imply that the device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0022] In addition, it should be noted that, in the description of the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "providing", "setting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be directly connected, or indirectly connected through an intermediate medium; it can be the communication between the two elements inside. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0023] Please refer to Figures 1 to 8 The embodiments of the present application include:

[0024] A high-power stepless speed change power output device, comprising a control system 1, a first driving mechanism 2, a second driving mechanism 3, a transmission mechanism 4, a distribution mechanism 5, a base 6, a support 7 and a gear box 8, the control system 1 is used for controlling the action of the first driving mechanism 2, the second driving mechanism 3 and the distribution mechanism 5, the left side of the base 6 is provided with the gear box 8, the gear box 8 is provided with the transmission mechanism 4, the right side of the base 6 is provided with the support 7, the right side of the support 7 is fixed with the first driving mechanism 2 and the second driving mechanism 3, the support 7 is provided with the distribution mechanism 5, the distribution mechanism 5 is used for switching the power output mode of the first driving mechanism 2 and the second driving mechanism 3;

[0025] The first driving mechanism 2 and the second driving mechanism 3 are the same in structure and each comprises a machine body 21, an output shaft 22, a driving piston 23, a connecting rod 24, a crank 25 and an adjusting assembly 26, the machine body 21 is fixedly connected to the right side of the support 7, a plurality of driving pistons 23 are arranged at equal angles in the circumference inside the machine body 21, the plurality of driving pistons 23 are slidably connected along the axis of the machine body 21, a driving cavity is formed at one end of the driving piston 23 and the machine body 21, the driving cavity is communicated with the output port of the external oil pump through an oil channel, the other end of the driving piston 23 is rotatably connected to one end of the connecting rod 24, the other end of the connecting rod 24 is rotatably connected to the crank 25, the crank 25 is fixedly connected to the adjusting assembly 26, the output shaft 22 is arranged at the other side of the adjusting assembly 26, the output shaft 22 is rotatably connected to the machine body 21, the volume change in the plurality of driving cavities can be controlled through the output and release of the oil, so as to drive the reciprocating movement of the piston 23 through the volume change, and the reciprocating movement of the piston 23 drives the rotation of the output shaft 22 through the connecting rod 24;

[0026] The adjusting assembly 26 comprises a shaft sleeve 261, an action piston 262, a supporting piston 263 and a first elastic element 264, the shaft sleeve 261 is slidably connected to one end of the output shaft 22, the sliding path of the shaft sleeve 261 is perpendicular to the axis of the output shaft 22, the action piston 262 is slidably connected to one end of the output shaft 22, the plurality of supporting pistons 263 are slidably connected to one end of the output shaft 22, the action piston 262 and the supporting piston 263 are oppositely arranged along the axis of the output shaft 22, the lower end surface inside the shaft sleeve 261 is connected to the supporting piston 263, the upper end surface inside the shaft sleeve 261 is connected to the action piston 262, the shaft sleeve 261 is eccentrically fixed to the crank 25, the first elastic element 264 is arranged between the supporting piston 263 and the output shaft 22, the first elastic element 264 forces the supporting piston 263 to move downward, the action piston 262 and the output shaft 22 form an adjusting cavity, the adjusting cavity is communicated with the output port of the external oil pump through an oil channel, the pressure in the adjusting cavity can be controlled by controlling the input and output of the oil pump, when the pressure in the adjusting cavity is greater than the elastic force of the first elastic element 264, the action piston 262 drives the shaft sleeve 261 to move upward, when the pressure in the adjusting cavity is less than the elastic force of the first elastic element 264, the supporting piston 263 drives the shaft sleeve 261 to move downward, so that the shaft sleeve 261 can move along the path perpendicular to the axis of the output shaft 22;(as Figure 5

[0027] ​The transmission mechanism 4 comprises a first gear 41, a second gear 42, a third gear 43, a transmission shaft 44 and a spline 45, the first gear 41 is fixedly connected with the output shaft 22 of the first driving mechanism 2, the second gear 42 is fixedly connected with the output shaft 22 of the second driving mechanism 3, one end of the transmission shaft 44 is rotatably connected with the bracket 7 through a bearing, the other end of the transmission shaft 44 is rotatably connected with the gear box 8 through a bearing, the spline 45 is fixedly connected with the transmission shaft 44, the third gear 43 is engaged with the spline 45, and the first gear 41 is engaged with the third gear 43;

[0028] The distribution mechanism 5 comprises a distribution piston 51, a transmission gear 52 and a second elastic element 53, the distribution piston 51 is slidably connected with the transmission shaft 22, a cavity is formed between the distribution piston 51 and the bracket 7, the cavity is connected with the oil outlet of the oil pump through an oil channel, the second elastic element 53 is arranged between the third gear 43 and the transmission gear 52, the third gear 43 and the transmission gear 52 can move axially along the spline 45, the left side of the third gear 43 is in contact with a bearing, the second elastic element 53 forces the transmission gear 52 to move to the right, the right side of the transmission gear 52 is in contact with the distribution piston 51, when the pressure in the cavity is greater than the force provided by the second elastic element 53, the distribution piston 51 moves to the left under the drive of the cavity pressure, so as to drive the transmission gear 52 and the second gear 42 to engage, when the pressure in the cavity is less than the force provided by the second elastic element 53, the transmission gear 52 moves to the right under the drive of the second elastic element 53, so as to drive the transmission gear 52 and the second gear 42 to disengage;(as Figure 3

[0029] The third gear 43 and the transmission gear 52 are provided with fixed grooves corresponding to the position of the second elastic element 53, and the fixed grooves are used for fixing the second elastic element 53;

[0030] ​The control system 1 comprises a displacement control sensor 11, a shuttle valve 12 and a servo control 13, the displacement control sensor 11 is used to control the servo control 13, the first driving mechanism 2 and the second driving mechanism 3, the servo control 13 is used to adjust the shuttle valve 12 to fill or discharge oil through the oil way P, the shuttle valve 12 leads to a control oil way P, which is used to connect the adjusting cavity of the action piston 262, during the filling process of the P oil way, the action piston 262 drives the shaft sleeve 261 to move, so as to adjust the moving distance of the shaft sleeve 261, in the design, the displacement is corresponding to the eccentric distance and the extension length of the action piston 262, in the work, the displacement can be obtained according to the feedback signal given by the displacement control sensor 11, and then compared with the required displacement, to determine whether to discharge or fill, after the signal reaches the servo control 13 module, the servo control 13 module controls the oil way P to fill oil into the adjusting cavity of the action piston 262, or discharges oil through the oil way T, to achieve the effect of controlling the displacement;

[0031] Through the above setting, in the actual working process, the specific working principle is as follows:

[0032] When the power output device needs to change the running speed:

[0033] The control system 1 controls the servo 13 to adjust the shuttle valve 12 to fill oil through the oil way P, and the oil flows into the adjusting cavity of the action piston 262 of the first driving mechanism 2 and the second driving mechanism 3, at this time, the pressure in the adjusting cavity increases, when the pressure in the adjusting cavity is greater than the elastic force of the first elastic element 264, the action piston 262 extends upward, since the action piston 262 and the inner upper end surface of the shaft sleeve 261 are connected, the support piston 263 and the inner lower end of the shaft sleeve 261 are connected, so as to drive the shaft sleeve 261 to move upward while compressing the first elastic element 264, since the shaft sleeve 261 and the crank 25 are fixed, the shaft sleeve 261 drives the crank 25 to further eccentrically move while moving, since the eccentric distance of the crank 25 determines the stroke of the driving piston 23, so as to affect the oil quantity required by the first driving mechanism 2 and the second driving mechanism 3 to move one circle, that is, the displacement of the first driving mechanism 2 and the second driving mechanism 3, so as to change the eccentric distance of the crank 25 of the first driving mechanism 2 and the second driving mechanism 3, that is, to change the displacement of the first driving mechanism 2 and the second driving mechanism 3, so as to affect the speed, after the shaft sleeve 261 drives the crank 25 to further eccentrically move, the displacement of the first driving mechanism 2 and the second driving mechanism 3 becomes larger, the torque becomes larger and the rotating speed decreases, when the oil is discharged through the oil way T, the first elastic element 264 forces the support piston 263 to move downward, so as to drive the shaft sleeve 261 to move downward, so as to reduce the eccentric moving distance of the shaft 25, at this time, the displacement of the first driving mechanism 2 and the second driving mechanism 3 becomes smaller, the torque becomes smaller and the rotating speed increases;

[0034] When the power output device load changes:

[0035] When a large torque is required, the oil pump pumps oil into the adjusting cavity of the distribution piston 51 through the oil channel, at which time the pressure in the cavity is greater than the force provided by the second elastic element 53, and the distribution piston 51 moves to the left under the drive of the cavity pressure, thereby driving the transmission gear 52 and the second gear 42 to mesh, and at the same time the first drive mechanism 2 and the second drive mechanism 3 are controlled by the servo control 13 to be at maximum displacement, so as to ensure that maximum torque can be provided, and after the machine is normally operated; the required torque is reduced, and in the power device of the present application, the distribution mechanism 5 is still in the closed state, but the displacement of the first drive mechanism 2 and the second drive mechanism 3 controlled by the servo control 13 is gradually reduced, the rotating speed of the first drive mechanism 2 and the second drive mechanism 3 is increased, and the speed of the whole power device is increased; when the machine is in an unloaded state and requires the device to provide very high speed, at this time the oil pump no longer pumps oil into the adjusting cavity of the distribution piston 51, so as to start pressure relief, and when the pressure in the cavity is less than the force provided by the second elastic element 53, the transmission gear 52 moves to the right under the drive of the second elastic element 53, thereby driving the transmission gear 52 and the second gear 42 to no longer mesh, at which time the second drive mechanism 3 stops oil supply and does not participate in work, and the system oil is supplied to the first drive mechanism 2, and at the same time the displacement of the motor is switched to the minimum to obtain the maximum rotating speed;

[0036] The above only describes the embodiments of the present application, and does not limit the patent range of the present application, and any equivalent structure or equivalent process transformation using the content of the present application specification and drawings, or direct or indirect application in other related technical fields, are also included in the patent protection range of the present application.

Claims

1. A high-power continuously variable power output device, characterized by comprising: The utility model provides a kind of hydraulic transmission system, including control system, first driving mechanism, second driving mechanism, transmission mechanism, transfer mechanism, pedestal, support and gear box, the control system is used to control the action of first driving mechanism, second driving mechanism and transfer mechanism, the left side of the pedestal is equipped with gear box, transmission mechanism is equipped in the gear box, the right side of the pedestal is equipped with support, the right side of the support is fixed with first driving mechanism and second driving mechanism, transfer mechanism is equipped in the support, and transfer mechanism is used to switch the power output mode of first driving mechanism and second driving mechanism. The control system includes displacement control sensor, shuttle valve and servo control, the displacement control sensor is used to control servo control, first driving mechanism and second driving mechanism, and the servo control is used to adjust the oil injection of shuttle valve via oil line P or the oil discharge via oil line T. The transmission mechanism includes first gear, second gear, third gear, transmission shaft and spline, the output shaft of first driving mechanism is fixedly connected with the first gear, the output shaft of second driving mechanism is fixedly connected with the second gear, one end of the transmission shaft is rotatably connected with the support through bearing, the other end of the transmission shaft is rotatably connected with the gear box through bearing, the spline is fixedly connected with the transmission shaft, the third gear is embedded with the spline, and the first gear is engaged with the third gear. The transfer mechanism includes transfer piston, transmission gear and second elastic element, the transfer piston is slidably connected with the transmission shaft, a cavity is formed between the transfer piston and the support, the cavity is connected with the output port of oil pump through oil channel, the second elastic element is arranged between the third gear and the transmission gear, the third gear and the transmission gear can move axially along the spline, the left side of the third gear is in contact with bearing, the second elastic element forces the transmission gear to move to the right, and the right side of the transmission gear is in contact with the transfer piston.

2. A large power stepless speed change power output device according to claim 1, characterized by The first driving mechanism and the second driving mechanism are structurally identical and each include body, output shaft, driving piston, connecting rod, crank and adjusting assembly, the body is fixedly connected to the right side of the support, a plurality of driving pistons are arranged at equal angles along the circumference inside the body, the plurality of driving pistons are slidably connected along the axis of the driving pistons and the body, a driving cavity is formed between one end of the driving piston and the body, the driving cavity is communicated with the output port of external oil pump through oil channel, the other end of the driving piston is rotatably connected with one end of the connecting rod, the other end of the connecting rod is rotatably connected with the crank, the crank is fixedly connected with the adjusting assembly, the other side of the adjusting assembly is provided with the output shaft, and the output shaft is rotatably connected with the body.

3. A large power stepless speed change power output device according to claim 2, characterized by The adjusting assembly comprises a sleeve, a moving piston, a supporting piston and a first elastic element, the sleeve is slidably connected at one end of the output shaft, the sliding path of the sleeve is perpendicular to the axis of the output shaft, the moving piston is slidably connected at one end of the output shaft, the supporting piston is slidably connected at one end of the output shaft, the moving piston and the supporting piston are oppositely arranged along the axis of the output shaft, the lower inner end surface of the sleeve is connected with the supporting piston, the upper inner end surface of the sleeve is connected with the moving piston, the sleeve and the eccentric of the crank are fixed, the first elastic element is arranged between the supporting piston and the output shaft, the first elastic element forces the supporting piston to move downward, the moving piston and the output shaft form an adjusting cavity, and the adjusting cavity is communicated with the output port of the external oil pump through an oil channel.

4. A large power stepless speed change power output device according to claim 1, characterized by The third gear and the transmission gear are provided with a fixing groove corresponding to the position of the second elastic element, and the fixing groove is used for fixing the second elastic element.

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